Magnetic data storage



2O Sheets-Sheet 1 R. R. EVERETT ETAL MAGNETIC DATA STORAGE June 13, 1961 Filed March 17, 1955 June 13, 1961 R. R. EVERETT ET AL 2,938,735

MAGNETIC DATA STORAGE 20 Sheets-Sheet 2 Filed March 17, 1955 N .GE

...DAPDO 0 wI 9mm mzzdzo 02.2;

m Umm N www O @um June 13, 1961 R. R. EVERETT ErAL 2,988,735

MAGNETIC DATA STORAGE 2O Sheets-Sheet 3 Filed March l?, 1955 June 13, 1961 R. R. EVERETT ET AL 2,988,735

MAGNETIC DATA STORAGE 2O Sheets-Sheet 4 Filed March 17, 1955 June 13, 1961 R. R. EVERETT ET Al. 2,988,735

MAGNETIC DATA STORAGE 2O Sheets-Sheet 5 Filed March 17, 1955 FIG.5

June 13, 1961 R R, EVERETT ETAL 2,988,735

MAGNETIC DATA STORAGE 20 Sheets-Sheet 6 Filed MarGh l?, 1955 June 13, 1961 Filed March 17, 1955 R. R. EVERETT ET AL MAGNETIC DATA STORAGE 20 Sheets-Sheet 7 20 Sheets-Sheet B June 13, 1961 R. R. EVERETT ETAL MAGNETIC DATA STORAGE Filed March l?, 1955 m A AINII 1 111.21 1 Lwoo 1 AINE 2 1 A n k l|\[ 1 1N N N :N QN NoN @ON SN @ON NON NON C316 NEEN N11; E 1m I TQ@ T om... i316 .6158 o -Qo ON ON moN\ O 11,. 1 f NN NNN 512% T @5 1 1&1 dzzs 02:1; 2011 ANTE; NEEN Esa oNN @N N N tN @1N QN SN .N 1 1 m A T m 1 Ai sum1@ 1 T EL 1 AINE? QQ A1 1 1 1 1 EN E@ 91 m 1 A YS T 1 non? 1 non? 1 m5 1 T w u QNN NNN NNN NNN @NN @NN NN NN 1@ m ...o ...5050 @5I 2.11.5510 Io 1 o m 1 ANNE EF1! 1 NNN NN NNN June 13, 1961 R. R. EVERETT ETAL 2,988,735

MAGNETIC DATA STORAGE 2O Sheets-Sheet 9 Filed March 17, 1955 June 13, 1961 R. R. EVERETT ETAI. 2,988,735

MAGNETIC DATA STORAGE Filed March l?, 1955 20 Sheets-Sheet 10 CONTINUOUS 10Q.

1's or O's INPUT VOLTAGE June 13, 1961 R. R. EVERETT ET Al. 2,988,735

MAGNETIC DATA STORAGE 2O Sheets-Sheet 1 1 Filed March l?, 1955 June 13, 1961 R. R. EVERETT ET AL 2,988,735

MAGNETIC DATA STORAGE Filed March 17, 1955 2O Sheets-Sheet 12 I` I l RF g o O To BIT 32 I g m g WRITE HEAD l Q 2 m I.I. I

I7 LL m O v I 09 O E S I I- -I l I A I,

I OQ O YO To BIT 31 I 3 m g g I.I. WRITE HEAD o L I- LL m G I n l o I I r- `Q 1 I l o I 2` N v on I I To BIT 2 3 u, ,7, 5' IL WRITE HEAD o ff 'Lm l I E E l g oo I O If f I I I I U. MIT-' ,o 0D O II To BIT I l 2 "5 t WRITE HEAD I D ug) m o l I O I I S I I I- I 5 I L) E n CLEAR u v ccm *E Lu O rf] E OD 43I|7I.I sec FIG. I2

WRITE CABLE I5 June 13, 1961 R. R. EVERETT l-:TAL 2,988,735

MAGNETIC DATA STORAGE 20 Sheets-Sheet 13 Filed March 17, 1955 7 3 n m w E s 9m: .Em; mzzO wnbw l @o oF Il 'Il I I.' 6 4 S 3 QQMI 04mm 5 E m25 o n m m m 20ml E l l m B3 E m m msm F m ll P 9mm 0 -I llll m T l l 2 c a T l l w 2 IIIII'II #UU uw G IA N J vel.. m l C 8 tno 9E: 9mm w S Q w gm 20E R U m M .1., T 3 D 5 A E D O 951 9mm R M 13, T tm 20E R DHI.. AG MR C E m. S L 4 UM M l msm Q ms 0mm G. 8 Sm @WH l 4 l W msm U w l C F mmm m C S FIG. 13

June 13, 1961 R R, EVERETT ETAL 2,988,735

MAGNETIC DATA STORAGE 2O Sheets-Sheet 14 Filed March 17, 1955 FROM READ CIRCUIT 1 STAGE 32 FROM READ CIRCUIT STAGE 31 FROM READ CIRCUIT STAGE 2 I FROM I READ CIRCUIT I STAGE 1 CLEAR IIII I T I I 1 I I I I I IA. Ll.

TEMPORARY STORAGE REGISTER DATA PROCESSING MACHIN mmm www

IIII LIIII m- .mi

Jne 13, 1961 R. R. Evl-:Rr-:TT ETAL 2,988,735

MAGNETIC DATA STORAGE 2O Sheets-Sheet 15 Filed March 1'7, 1955 Owlv Omm+

Omm+

June 13, 1961 R. R. EVERETT Erm.

MAGNETIC DATA STORAGE Filed MaICh l?, 1955 20 Sheets-Sheet 16 FIG. I7

ci :NPUT

1o W, T

24K 24K 24K 27K 100uuf All AUA

OOK IOOK OUTPUT TO WRITERS DWD June 13, 1961 R, R, EVERETT ETAL 2,988,735

MAGNETIC DATA STORAGE 2O Sheets-Sheet 17 Filed March 17, 1955 Omm+ June 13, 1961 R. R. EVERETT ETAL 20 Sheets-Sheet 18 Q OUTPUT 454- i453 22 wv-o+|ov L 1o T 8.2K

TNPUT 456 FROM own [gl IIYII INPUT FROM FF'1" June 13, 1961 R. R. Evr-:RETT ETAL 2,988,735

MAGNETIC DATA STORAGE Filed March 17, 1955 2O Sheets-Sheet 19 30V +9ov F 2 1 -SOV OUTPUT 15K 15K "0"OUTPUT 565 +|0v 82K 55| 561 559 SET \1;1 111/ CLEAR COMPLEMENT C F F sET CLEAR COMPLEMENT F I G. 2O

June 13, 1961 R. R. EvERr-:TT ETAL 2,938,735

MAGNETIC DATA STORAGE Filed March 17, 1955 2O Sheets-Sheet 2O i L Flc. 23 B OUTPUT OUTPUT 

